CN1388627A - Electric machine for electrodynamic steering gear - Google Patents

Electric machine for electrodynamic steering gear Download PDF

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Publication number
CN1388627A
CN1388627A CN01139444A CN01139444A CN1388627A CN 1388627 A CN1388627 A CN 1388627A CN 01139444 A CN01139444 A CN 01139444A CN 01139444 A CN01139444 A CN 01139444A CN 1388627 A CN1388627 A CN 1388627A
Authority
CN
China
Prior art keywords
electric machine
stator
carriage
steering gear
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN01139444A
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Chinese (zh)
Other versions
CN1187877C (en
Inventor
冈崎正文
柳生泰秀
米贺多秀树
高木哲尚
逸见晋介
阿久津悟
杉山武史
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of CN1388627A publication Critical patent/CN1388627A/en
Application granted granted Critical
Publication of CN1187877C publication Critical patent/CN1187877C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations

Abstract

A motor for use with a motorized power steering apparatus is provided in which the number of component members can be reduced, and workability in assembling the component members can be improved, while enabling miniaturization of the entire motor. The motor includes a bottomed cylindrical frame (31), a bracket (32) fixedly secured to the frame (31), a rotating element (8) having a shaft (7) rotatably supported by a frame side bearing (110) fixedly mounted on the frame (31) and a bracket side bearing (100) fixedly mounted on the bracket (32), a stationary element (6) fixedly attached to the frame (31) around an outer periphery of the rotating element (8) and having a stator winding (18) wound therearound, a rotation sensor (15) provided on the bracket (32) at a housing side of the bracket side bearing (100), and a plurality of sensor signal wires (38) for supplying and receiving signals to and from the rotation sensor (15).

Description

Electric machine for electrodynamic steering gear
Technical field
The electric motor driven power steering that the present invention relates to a kind of steering wheel steering force that strengthens vehicle is with motor (to call " motor " in the following text).
Background technology
Fig. 9 represents to be located near the stereogram of the motor 2 the axletree 1, as shown in figure 10, and worm gear 4 and worm screw 3 engagements that are connected on the motor 2.The worm screw 3 and the worm gear 4 that steering force are passed to steering wheel are contained in the housing 60, are encircled by O shape between motor 2 and the housing 60 and guarantee its sealing.
Figure 11 is the sectional view of traditional motor 2, and Figure 12 is the exploded view of the motor 2 of Figure 11.Motor 2 is provided with: columnar framework 5, be fixed in the stator 6 on this framework 5, by rotating shaft 7 with constitute the N magnetic pole, the rotor 8 that the cylinder-shaped magnet of S magnetic pole constitutes, be installed in the front rack 9 that framework 5 one sides and its central part are fixed with load side (steering wheel side) bearing 10, be installed in the tail-bracket 12 that framework 5 opposite sides and its central part are fixed with load opposition side (steering wheel opposition side) bearing 11, the fastening bolt 13 that this tail-bracket 12 is connected with front rack 9, be located at the terminal block 14 of load opposition side bearing 11 peripheries, be fixed on the tail-bracket 12 and the resolver formula rotation sensor 15 of the anglec of rotation of detection rotor 8, be installed on the tail-bracket 12 and cover the waterproof cover 16 of rotation sensor 15.
Stator 6 is provided with: along the circumferential direction form with interval the groove (not shown) that extends along axis direction stator core 17, be wrapped in stator winding 18 in the stator core 17, be located at the coil rack 19 between stator core 17 and the stator winding 18.
Transducer 15 is provided with: be fixed on the end of rotating shaft 7 oval rotor 45, be located at the stator 46 of rotor 45 peripheries, and be connected with the many sensor signal lines 24 that connect grommet 25.
Terminal block 14 has each phase terminal 21 of 4 stator side of ring-type.Each phase terminal 21 with connect lead with the U of grommet 22 mutually, V reaches each phase conductor 23 connection of W phase mutually.
On the motor 2 of said structure, electric current flows through from each lead 23 that U phase, V reach the W phase mutually, makes stator winding 18 produce rotating magnetic field, rotor 8 rotations.The revolving force of rotating shaft 7 passes to the wheel hub 26 that is formed at rotating shaft 7 ends and carries out worm gear 3, the worm screw 4 that spline is connected, and strengthens the control of steering wheel.
The peripheral part of conventional motors 2 is made of the tail-bracket 12 of fixing rotation sensor 15, the framework 5 of fixed stator 6, the front rack 9 and the waterproof cover 16 of constantly acting load side bearing 10, the member number of packages is many, so exist assembling procedure and the O shape between each member between each member to encircle more than 27,28,29 problem.
In addition, each terminal 21 of the stator side of terminal block 14 is radially to extend, and has the big problem of motor 2 radial dimensions.
In addition, each terminal 21 of stator side is a plate-shaped, when each phase conductor 23 directly is connected with each terminal 21 of stator side by welding etc., has the attended operation narrow space, connects this problem of difficulty.
In addition, many sensor signal lines 24 be connected grommet 25 respectively, operating efficiency is low.
In addition, as shown in figure 13, grommet 25 that connects for sensor signal lines 24 and the grommet 22 that connects for each phase conductor 23 are set, respectively so also there are the many problems of member number of packages.
Summary of the invention
The present invention is in order to address the above problem, and purpose is to provide a kind of and cuts down the member number of packages, improves packaging efficiency and can realize the electric machine for electrodynamic steering gear of miniaturization simultaneously.
Electric machine for electrodynamic steering gear of the present invention is provided with: the framework that round-ended cylinder shape is arranged; Be fixed on the carriage of the peristome of described framework; Has the rotor that connects this carriage, is fixed on the frame side bearing on the described framework and is fixed on the bracket side bearing supporting on the carriage and rotate rotating shaft freely; Periphery at this rotor is fixed on the described framework, and package has the stator of stator winding; In a side of the close described housing of described bracket side bearing, be located on the carriage and detect the rotation sensor of the anglec of rotation of described rotor;
And be connected with this rotation sensor, to many sensor signal lines of rotation sensor input/output signal.
In addition, rotation sensor is made of the rotor that is fixed in the stator on the carriage and be fixed on the rotating shaft, and the changes of magnetic field of the described stator that the rotation of rotor is caused detects, thereby detects the anglec of rotation of rotor.
In addition, be provided with terminal block in the side of the close bracket side bearing of stator, this terminal block is connected with stator winding, simultaneously around rotating shaft with interval multi-layer configuration each phase terminal of circular stator side is arranged.
In addition, on carriage, be provided with the connection base plate, this connection base plate have base and be fixed in base and is connected with the connecting portion that extends from each phase terminal of stator side along axis direction, each phase terminal of lead side that the while is connected with each phase conductor to the stator winding supplying electric current.
In addition, form the insertion mouth that inserts for the end of connecting portion on base, this inserts actinal surface and is taper to the peristome expansion.
In addition, many sensor signal wire harness constitute split conductor together.
In addition, in the end of the close connector of split conductor, with bonding between each sensor signal lines, and periphery coats with the water proofing property heat-shrinkable tube with sealant.
Each sensor signal lines of the end of close connector is arranged in a row.
Split conductor is fixed on screw top on the carriage by connecting base plate.
A plurality of protuberance clamping and positioning that split conductor is formed on carriage.
Each phase conductor and sensor signal lines connect a grommet.
Description of drawings
Fig. 1 is the sectional view of the electric machine for electrodynamic steering gear of expression the invention process form 1.
Fig. 2 is the exploded view of the electric machine for electrodynamic steering gear of Fig. 1.
Fig. 3 is the front view of the connection base plate of Fig. 1.
Fig. 4 is the cutaway view at the main position of connection base plate of Fig. 3.
Fig. 5 is the vertical view of the grommet of Fig. 1.
Fig. 6 is the front view of internal structure of close carriage one side of the electric machine for electrodynamic steering gear of expression the invention process form 2.
Fig. 7 is the VII-VII line cutaway view of the split conductor of Fig. 6.
Fig. 8 is the cutaway view of other example of split conductor
Fig. 9 is provided in a side of the stereogram of axletree electric machine for electrodynamic steering gear nearby.
Figure 10 is the partial sectional view after the electric machine for electrodynamic steering gear of Fig. 9 is installed on the gear box.
Figure 11 is the sectional view of traditional electric machine for electrodynamic steering gear.
Figure 12 is the exploded view of the electric machine for electrodynamic steering gear of Figure 11.
Figure 13 is the vertical view of the grommet of Figure 11.
Embodiment
Example 1
Example of the present invention below is described, member and position that all with traditional electric machine for electrodynamic steering gear is identical are all represented with prosign.
Fig. 1 is the sectional view of expression electric machine for electrodynamic steering gear (to call " motor " in the following text) 30, Fig. 2 is the exploded view of the motor 30 of Fig. 1, Fig. 3 is the front view of the connection base plate 39 of Fig. 1, and Fig. 4 is the main position cutaway view of the connection base plate 39 of Fig. 3, and Fig. 5 is the vertical view of the grommet 36 of Fig. 1.
Motor 30 is provided with: the framework 31 that round-ended cylinder shape is arranged; Be fixed on the stator 6 on the framework 31; By axle 7 with constitute the rotor 8 that the cylinder-shaped magnet of N magnetic pole, S magnetic pole constitutes; Lean on the carriage 32 of bolt 33 at the periphery of framework 31; Be inlaid in the resolver formula rotation sensor 15 in the carriage 32; Be inlaid in the bracket side bearing 100 in the carriage 32; Be fixed on the frame side bearing 110 of the underside recess of framework 31; Be fixed on the terminal block 34 on the side of close bracket side bearing 110 of stator 6; Connect each phase conductor 37 and the bundle many sensor signal lines 38 together of grommet 36; What connect each phase conductor 37 and terminal block 34 is connected base plate 39.
Stator 6 is provided with: be formed with interval along the stator core 17 of the groove (not shown) of axis direction extension at circumferencial direction; Be wrapped in the stator winding 18 on the stator core 17; Be located at the coil rack 19 between stator core 17 and the stator winding 18.
Rotation sensor 15 is provided with: be fixed on the oval rotor 45 on the rotating shaft 7; Be located at the stator 46 of rotor 45 peripheries.
Terminal block 34 is provided with: the retainer 41 with groove; Put into U phase, the V phase of each groove, each phase terminal 35 of stator side of W phase.Each phase terminal 35 of stator side is connected with stator winding 18.It is banded that each phase terminal 35 of stator side is when expanding into the plane, is toroidal when putting into each groove.
Connecting base plate 39 is provided with: have the base 42 that inserts mouth 40 towards the taper of peristome expansion; Each phase terminal 43 of lead side that the connecting portion 44 that protrudes along axis direction by each terminal from each phase terminal 35 of stator side connects.
The motor 30 of said structure at first is under the state that bracket side bearing 100 and frame side bearing 110 are fixed rotor 8 to be installed on the carriage 32.Then, each phase conductor 37 is welded on each phase terminal 43 of lead side that connects base plate 39, with screw this patch bay 39 is fixed on the carriage 32 again.Then, the framework 31 that will be fixed with stator 6 with bolt 33 is fixed on the carriage 32.At this moment, connecting portion 44 inserts mouth 40, and by connecting portion 44, each phase terminal 35 of stator side contacts with each phase terminal 43 of lead side.Afterwards, weld between the top ends with the top ends of each phase terminal 35 of stator side and each phase terminal 43 of lead side.
This motor 30 is with bolt carriage 32 to be fixed on spiral shell is housed takes turns on the housing 60 of 4 grades.
But, rotation sensor 15 is arranged on the outside of bracket side bearing 100, so also can adjust the position of stator 46 after the assembling.
Adopt the motor 30 of said structure, electric current is by each phase conductor 37, make stator winding 18 produce rotating magnetic fields after, rotor 8 rotations.The revolving force of rotating shaft 7 is by carrying out the screw rod 3 that spline is connected with the wheel hub 26 of the end that is formed at rotating shaft 7, and worm gear 4 passes to steering wheel, for the control that strengthens steering wheel.
In addition, the rotation of oval-shaped rotor 45 makes the magnetic field of stator 46 produce fluctuation, and its undulating value is exported the anglec of rotation of coming detection rotor 8 as voltage by sensor signal lines 38.
The main position of the motor 30 of said structure is with having round-ended cylinder shape framework 31 and carriage 32 to cover, 15 of rotation sensors that are positioned at carriage 32 outsides are covered by housing 60, compare with traditional structure, do not need tail-bracket and waterproof cover 16, the member number of packages is cut down, and assembly operation operation between each member and the ring of the O shape between each member 61,101 obtain cutting down.
In addition, each phase terminal 35 of stator side be rotating shaft 7 around be configured to interval multiple circular, so can dwindle the radial dimension of motor 30.
In addition, each phase conductor 37 is connected by each phase terminal 35 of lead side each phase terminal 43 and stator side that connects base plate 39, the attended operation that the connecting portion of each phase terminal 43 of lead side and each side terminal 35 of stator side is 44 can be carried out in carriage 32 outsides, so the welding operation raising.
In addition, inserting mouth 40 is cone-shaped, so connecting portion 44 can insert mouth 40 sleekly.
Example 2
Fig. 6 represents the front view of the motor 50 of the invention process form 2 near the internal structure of carriage 32 1 sides, and Fig. 7 is the cutaway view of VII-VII of the split conductor 52 of Fig. 6.
The end of the close connector of the split conductor 52 of this example is bonding with sealant 53 with being insulated between each sensor signal lines 51 of coating, and periphery coats with water proofing property heat-shrinkable tube 54 and constitutes.
This split conductor 52 as shown in Figure 7, holding wire 51 roughly is arranged in a row.As shown in Figure 8, when having many holding wires 51 to surround around the holding wire 51, sealant 53 can not fully arrive central signal line 51 around, the split conductor 52 of this example does not then have these misgivings.
In addition, in this example, split conductor 52 is configured in and will connects screw 55 tops that base plate 39 is fixed on carriage 32, because therefore split conductor 52, can prevent that screw 55 from coming off from connecting base plate 39 along the axis direction pushing of screw 55.But, have a plurality of protuberances 56 that clamp split conductor 52 on carriage 32, split conductor 52 relies on this protuberance 56 by screw 55 tops.
Above-mentioned each example is the anglec of rotation that adopts resolver formula rotation sensor 15 to come detection rotor 8, certainly, be not limited in this kind form, also can adopt magnet, the Hall integrated circuit that fluctuates in the magnetic field of magnet periphery configuration detection magnet simultaneously or the rotation sensor of MR element are installed on rotating shaft.
As mentioned above, be provided with owing to electric machine for electrodynamic steering gear of the present invention: the framework that round-ended cylinder shape is arranged; Be fixed on the carriage of described frame openings portion; Connect this carriage, have frame side bearing that is fixed in described framework and the carriage side shaft that is fixed in a carriage rotation rotor of rotating shaft of supporting freely simultaneously; Be fixed in the stator that described framework, package have stator winding in this rotor periphery; In the close described case side of described bracket side bearing, be located on the carriage and detect the rotation sensor of the anglec of rotation of described rotor; Be connected with this rotation sensor and to many sensor signal lines of rotation sensor input/output signal, therefore, main position is with having round-ended cylinder shape framework and carriage to cover, the rotation sensor that is positioned at the carriage outside is covered by housing, compare with traditional structure, do not need tail-bracket and waterproof cover, the member number of packages is cut down, and assembly operation operation between each member and the ring of the O shape between each member obtain cutting down.
In addition, rotation sensor is made of the rotor that is fixed in the stator on the carriage and be fixed on the axle, the changes of magnetic field of the described stator that the rotation of rotor is caused is detected, thereby detects the anglec of rotation of rotor, so the anglec of rotation of available simple structure detection rotor.
In addition, be provided with terminal block in the side of the bracket side bearing of stator, this terminal block is connected with stator winding, has around the rotating shaft of rotor each phase terminal of circular stator side of multi-layer configuration with interval simultaneously, so can dwindle the motor radial dimension.
In addition, on carriage, be provided with the connection base plate, this connection base plate have base and be fixed in base and with from each phase terminal of stator side by the connecting portion that axis direction extends is connected, the while is connected with each phase conductor to the stator winding supplying electric current each phase terminal of lead side, so the operation that each phase terminal of lead side is connected with the connecting portion of each phase terminal of stator side can be carried out the welding operation raising in the carriage outside.
In addition, having formed towards the peristome expansion on base is the insertion mouth that insert taper, the end that supplies connecting portion, so connecting portion can insert mouth sleekly.
In addition, many sensor signal wire harness constitute split conductor together, improve so holding wire penetrates the perforation operability of grommet.
In addition, split conductor is with bonding with sealant between each sensor signal lines, and periphery is with water proofing property heat-shrinkable tube coating formation, so the water proofing property of split conductor improves.
In addition, each sensor signal lines is to be arranged in a row, so the whole periphery of each sensor signal lines is adhered to by sealant substantially, the sealing of split conductor improves.
In addition, split conductor is fixed on screw top on the carriage by connecting base plate, so can prevent coming off of screw.
In addition, split conductor relies on a plurality of protuberances that form on the carriage and clamps, locatees, so split conductor is stablized on carriage and can not moved.
In addition, each phase conductor and sensor signal lines connect a grommet, so get final product with a grommet.

Claims (11)

1. an electric machine for electrodynamic steering gear is fixed on the housing, and the gear of the transmission of torque of motor being given steering wheel shaft is housed in this housing,
It is characterized in that, be provided with: the framework that round-ended cylinder shape is arranged;
Be fixed on the carriage of the peristome of described framework;
Has the rotor that connects this carriage, is fixed on the frame side bearing on the described framework and is fixed on the bracket side bearing supporting on the carriage and rotate rotating shaft freely;
Periphery at this rotor is fixed on the described framework, and package has the stator of stator winding;
In a side of the close described housing of described bracket side bearing, be located on the carriage and detect the rotation sensor of the anglec of rotation of described rotor;
Be connected with this rotation sensor, to many sensor signal lines of rotation sensor input/output signal.
2. electric machine for electrodynamic steering gear according to claim 1, it is characterized in that, rotation sensor is made of the rotor that is fixed in the stator on the carriage and be fixed on the rotating shaft, the changes of magnetic field of the described stator that the rotation of rotor is caused detects, thereby detects the anglec of rotation of rotor.
3. electric machine for electrodynamic steering gear according to claim 1 and 2, it is characterized in that, side at the close bracket side bearing of stator is provided with terminal block, this terminal block is connected with stator winding, simultaneously around rotating shaft with interval multi-layer configuration each phase terminal of circular stator side is arranged.
4. electric machine for electrodynamic steering gear according to claim 3, it is characterized in that, on carriage, be provided with the connection base plate, this connection base plate have base and be fixed in base and is connected with the connecting portion that extends from each phase terminal of stator side along axis direction, each phase terminal of lead side that the while is connected with each phase conductor to the stator winding supplying electric current.
5. electric machine for electrodynamic steering gear according to claim 4 is characterized in that, forms the insertion mouth that inserts for the end of connecting portion on base, and this inserts actinal surface and is taper to the peristome expansion.
6. electric machine for electrodynamic steering gear according to claim 1 and 2 is characterized in that, many sensor signal wire harness constitute split conductor together.
7. electric machine for electrodynamic steering gear according to claim 6 is characterized in that, in the end of the close connector of split conductor, with bonding between each sensor signal lines, and periphery coats with the water proofing property heat-shrinkable tube with sealant.
8. electric machine for electrodynamic steering gear according to claim 7 is characterized in that, each sensor signal lines of close connector is arranged in a row.
9. electric machine for electrodynamic steering gear according to claim 7 is characterized in that, split conductor will be by connecting the top that base plate is fixed on the screw on the carriage.
10. according to claim 7 or 8 described electric machine for electrodynamic steering gear, it is characterized in that a plurality of protuberance clamping and positioning that split conductor is formed on carriage.
11., it is characterized in that each phase conductor and sensor signal lines connect a grommet according to each described electric machine for electrodynamic steering gear in the claim 1,2,4,5,7,8.
CNB011394447A 2001-05-25 2001-11-21 Electric machine for electrodynamic steering gear Expired - Fee Related CN1187877C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2001157435A JP3816353B2 (en) 2001-05-25 2001-05-25 Electric power steering motor
JP157435/01 2001-05-25
JP157435/2001 2001-05-25

Publications (2)

Publication Number Publication Date
CN1388627A true CN1388627A (en) 2003-01-01
CN1187877C CN1187877C (en) 2005-02-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNB011394447A Expired - Fee Related CN1187877C (en) 2001-05-25 2001-11-21 Electric machine for electrodynamic steering gear

Country Status (6)

Country Link
US (1) US6750574B2 (en)
JP (1) JP3816353B2 (en)
KR (1) KR100457955B1 (en)
CN (1) CN1187877C (en)
DE (1) DE10162208B4 (en)
FR (1) FR2825200B1 (en)

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